Stop motion for carding machines



Mg'y 22, 1951 I 'r. HAND 2,554,104

STOP mmou FOR cmnmc MACHINES Filed April 10, 1948 5 Sheets-Sheet 1 Q wuv/rvto'bt THoMAs HAND.

May 22, 1951 Y 1'.'| HAND s10? MOTION FOR CARDING MACHINES Piiled April 10, 1948 5 Sheets-Sheet 2 THOMAS L. HAND.

ATTORNEY swam tori T. L. HAND STOP MOTION FOR CARDING MACHINES May 22, 1951 5 Sheets-Sheet 3 Filed April 10, 1948 THOMAS L. HAND,

. Ma '22, 1951 T. L, HAND 2,554,104

STOP MOTION FOR CARDING MACHINES Filed April 10, 1948 5 Sheets-Sheet 4 THOMAS L. HA/vp,

y- 1951 T. L. HAND 2,554,104

STOP MOTION FOR CARDING MACHINES Filed April 10, I948 5 Sheets-Sheet 5 THOMAS L. HAND,

awue/rvfob- Patented May 1951 Thomas L. Hand, Belmont, N. 0., assignor of one- "haIftoF. M. Grier, Belmont, N. C.

P wi err-1 48 S ri e- 20-223 This invention relates to a stop motion for use on revolving fiat card machines and the like. It is a well known fact that card machines have a revolving cylinder which delivers carded material, such as cotton, out synthetic fibres, and other fibres in lap form to a conventional dofier cylinder and this carded material is stripped from the dofler cylinder by means of an oscillating stripper knife .or comb. After the paralleled. fibre'sare combed from the doifer cylinder by the comp, they are formed into a web extendi the full width of the doffer cylinder which is conyerged by means of a trumpet, into a sliver, which passes through an adjacent pair of calender rolls after which the sliver goes through a ooiler to a ceilin ca in many instances a portion of the web of paralleled fibres breaks and falls away from that portion of the sheet which is being condensed into the sliver and this will cause the sliver t'o'b'e of an uneven density at variouspoints along its'length as it is delivered to the coiling can.

Therefore, I have provided stop motion means, disposed adjacent the calender rolls, comprising a movable trumpet which may be disposedagainst the conventional trumpet, or the conventional trumpetcould be omitted and only the new truth} pet vouldthen be used." My new movable trumpet a rod extending downwardly from the lower edge of the same, and this rod is secured to t a transverse shaft one end of which is connected tostopmotion rneans which is actuated whenever "the density of the sliver passing throug'hth'e movable trumpet to the calender rolls'dec rejases so as to permit the movable trumpet to "fall-away from theconventionaltrumpet, by gravity, which will, of course, transmit a partial "rotation to the shaft, to which it is connected, and stopfthe mar -w l o It is an object of this invention to provide ,means through which the sliver from the doffer cylinder must pass from the doffercylinder, Said means being adapted to move in an arcane th towards the doff'er cylinder whenever the density of the sliver not SllffiClBllt to hold saibl'njieians in a vertical position, this means 'being'adapted to lowera vertically disposed shaft ,5?) thatjm'ean's such asan oscillating'plate which slides .onihe upper end ofthevertical shaft isvcauseditolengagea l'ever which isconnected to the convenj nahshi per handle for knocking ofi' the rna 9.1 1

inasmuch, as this stop motion is aut emetic, i it is lanether. object qr this. invention 'tqi itivid bl'e means whereby when the machine is" anti;-

2 Claims. (01. 19-168) matically stopped, in the manner heretofore described, signalling means such as a signal arm moves into view of the operator to thus warn the operator that the doffer cylinder and other associated parts at the discharge end of the machine have stopped.

Some of the objects of the invention having been stated, others will appear as the description proceeds when taken in connection with the accompanying drawings in which:

Figure 1 is a top plan view of the doffer or discharge end of a conventional revolving flat card machine showing this invention applied thereto;

Figure 2 is a front elevation of a portion of the discharge end of a machine with portions broken away and being taken substantially along the line 2 2 in Figure 1;

Figure 3 is an elevation with portions broken away, omitting the gearing, but showing the gear housing in dotted lines and is taken looking from the right-hand side of Figure 1 to the left, showing the various parts occupying the position in which they are disposed when the machine has been stopped;

Figure 4 is a view similar to Figure 3, but shows the various parts occupying the position in which they are disposed when the machine is opera-t- Figure 5 is an isometric view of the invention showing a portion of themachine in dotted lines and is taken substantially along the line 5'5' in Figure 4; Figure 6 is an enlarged isometric view showing the signal means in a solid line on position and in a dotted line off position, as well as other related parts, and being takensubstantially along the line 6-4; in Figure 1; Figure 7 is a vertical sectional view taken substantially along the line 7-? in Figure 1";

Figure 8- is a vertical sectional view taken substantially along the line 8 8 in Figure 5, showing the flanged cam wheel in two positions; Referring more specifically to the drawings the numeral l0 broadly designates a cemenrtional frame of ,a revolving fiat card machine. The frame it comprises vertical side frame membersll and i2 which are bridged at ,their front ends by a horizontally disposedpiate 13 having a flange Iii projecting downwardly from e ont edge thereof.

fixedly mounted thereon. The shaft I8, in the doffer cylinder 20, has, fixedly mounted on the right-hand end thereof, as observed in Figures 1 and 2, a gear wheel 22 which engages a pinion 23 fixedly mounted on a stub shaft 24. The stub shaft 24 is rotatably mounted in a bearing portion 25 of a substantially horizontally disposed, and longitudinally extending lever bar 26 which is pivotally mounted as at 21 on the outside vertical surface of the side frame member I2. The shaft 24 also has, fixedly mounted on one end thereof, a pulley 30 which has mounted thereon one end of a belt 3I, the other end of which is connected to conventional driving means for the machine, not shown. Thus, the pinion 23 is driven by the pulley 30 on the shaft 24 and the pinion 23 transmits rotation to the gear 22, when the pinion is in engagement with the gear 22, as shown in Figure 4.

The horizontally disposed lever bar 26 extends to the left in Figure 4, from the pivot point 27, and has fixedly mounted therein an outwardly projecting transverse pin 35. A vertical plate 31, disposed adjacent the front end of the lever bar 26, has an angularly disposed slot 36 therein which is engaged by the pin 35. The plate 3'! is pivotally mounted at its front end on a stud 38. The stud 38 also has pivotally mounted thereon, the lower end of a shipper lever 4G which extends upwardly and is pivotally mounted on a stud 4| which is secured to a downwardly projecting vertically disposed plate 42 the upper edge of which is welded to the horizontally disposed plate I3 and the rearmost edge of which is welded to the vertical side frame member I2.

This shipper lever 40 extends upwardly from the stud 4i and curves to the left, as observed in Figure 4, and has integral therewith a handle portion 43. There is also pivotally mounted on the stud 4|, between the shipper lever 40 and the vertically disposed plate 42, one end of a bell crank 44 which extends rearwardly and then has a vertically disposed and downwardly projecting portion 45 integral therewith which engages that side of the plate 31 which is adjacent the side frame member I2. This .downwardly projecting arm 45 has secured thereto, by screws 46, a vertically disposed bar 41 which is in spaced relation to the arm 45 and engages the opposite side of the plate 31. The arm 45 and the bar 41' have fixedly mounted therein a pin 59 which penetrates a curved slot i in the plate 31.

Secured to the top surface of the vertical side frame member II, by a screw 69, is a conventional comb box 6| in which a shaft 62 is oscillatably mounted. This shaft 62 (Figure 1) has fixedly mounted thereon a pulley 53 which .has mounted thereon one end of a belt 64 which extends rearwardlyto, and is driven by, conventional means, not shown. The shaft 62 extends through the conventional comb box GI and is connected, in a conventional manner, to one end of a comb shaft 65 the other end of which is oscillatably mounted in a conventional bearing block 66 secured to the upper surface of the vertically disposed side frame member I2, by any suitable means such as screws 61 (Figures 1 and 6). The shaft 65 has, extending rearwardly therefrom, a plurality of arms 68 which have connected to the rearmost ends thereof a conventional stripper knife 'I'Il which intermittently engages the periphery of the doi- 4 fer cylinder 2|], in a. conventional manner, to thus comb the cotton stock from the surface thereof in the form of a web indicated at "M.

This web I4 converges and is condensed, in form, to a sliver 11 and passes through a movable trumpet I5 having a small aperture :6 in the center thereof. The trumpet i5 is a part of this invention and is to be hereinafter described. The sliver H, which is formed by the web I4 as it condenses, then passes through a conventional trumpet I8, against which the movable trumpet I5 is adapted to be urged by the web I4 passing through the movable trumpet I5 and into the trumpet I8. The trumpet I8 is fixedly mounted in a conventional calender roll housing 8| having vertical slots 86 in each side thereof which have rotatably mounted therein an upper calender roll 82. The upper calender roll 82 is an idler roll and is fixedly mounted on a stub shaft 35 and the stub shaft 85 is rotatably mounted in the slots 86 in the calender roll housing SI. The upper calender roll 82 engages a lower calender roll 83 which is fixedly mounted on a shaft 81 which is rotatably mounted in the vertical side walls of the calender roll housing 8I. The calender roll housing BI is secured, by bolts to the top surface of the horizontally disposed plate member 43 of the card frame It.

The shaft 81, on which the lower calender roll 83 is fixedly mounted, extends outwardly from the calender roll housing 8I and is rotatably mounted at its right-hand end, in Figure 1, in a bearing block 92 which is secured by a bolt 93 to the upper surface of the horizontally disposed plate I3, of the frame II). The shaft 81 also extends outwardly beyond the bearin block 92, in Figure 1, and has fixedly mounted thereon a pinion 94 which engages an idler pinion 95 which in turn engages another idler pinion 9'0 and this idler pinion 96 engages the gear wheel 22 and thus rotation is transmitted from the gear wheel 22 to the pinion 94 to rotate the shaft 81 in a counter-clockwise direction, as observed in Figures 3 and 4. The pinions 94, 95 and 96 are, housed within, and rotatably mounted in, a conventional gear housin I00 which has an inwardly projecting ear IOI integral therewith which is secured on the upper surface of an outwardly projectin portion I02 of the bearing block 66 and is secured to the same by one of the screws 61 which secure the bearing block 66 to the upper surface of the vertical side frame member I2 (Figures 2, 3, 4 and 6). Welded to the left-hand vertical surface of the gear housing I00, in Figure 2, and also welded to the horizontally disposed ear IIlI is a triangularly shaped bracin plate I04 which serves to lend rigidity to the gear housing I 00.

After the sliver I1 (Figure 7) passes through the conventional trumpet 18 it then passes between the conventional calender rolls 82 and 83 and then extends upwardly and above a coiler bonnet IIOa of conventional coiler III] into which the sliver I1 is guided, by a conventional forming trumpet III. The sliver is condensed as it passes downwardly through the forming trumpet III, and then the sliver 1'! extends downwardly from the coiler III] and is finally delivered into a conventional sliver can H2. The sliver can H2 is rotated by, and supported by means, not shown, disposed within a conventional portion II3 of the coiler H0. The portion II3 has an upright portion I I4 integral therewith, the upper end of which is connected to the conventional disagree coiler bonnet IIIla at the upper ndbf the coiler IIO. H I

All of the parts heretofore described, with the exception of the movable trumpet 'I5, are conventional parts of a revolving flat card machine and it is with these parts that this invention is adapted to be associated. It has already been described how the shaft 81 rotates in a counter-clockwise direction, as observed in Figures 3 and 4, and howrotation is transmitted to the shaft 8'! through the gear 34 which is mounted on the right-hand end of the shaft 81 in Figure 1. Fixedly mounted on the shaft 81 and disposed between the bearing block 92 and the pinion 94, is a flanged cam wheel I which is circular in cross-section but is penetrated off-center by the shaft 81'. This flanged cam wheel I20 has loosely mounted thereon a strap iron member comprising an upper arcuate member i2l anda lower arcuate member I22, the inner surfaces of which are adapted to conform to the periphery of the flanged cam wheel I20. The upper arcu'ate member I2! and the lower arcuate member I22 are bent outwardly at their proximate ends to from lip portions I23 and I29 which are penetrated by bolts I24 to thus secure the upper and lower arcuate members I2I and. I22 together. The lower arcuate member I22 has an outwardly extending lip portion I25 which is integral with the lip portion I23 and this lip portion I25 is adapted to engage a notch I26 in the upper end of a substantially vertically disposed lever bar [27 when the stop motion is actuated, in a, manner to be later described. The bolt I24, that secures the rearmost ends of the arcuate strap iron members I2I and I22 together, also secures a short wire member I28 to the upper surface of the outwardly extending lip portion I23, the purpose of which will be later described.

The substantially vertically disposed lever bar I2? is pivotally mounted on a shoulder bolt I30 (Figures 3 to 6 inclusive) and this shoulder bolt I30 penetrates an upwardly extending portion I of an angle plate I33 and is secured in the same, by any suitable means such as a nut I32 which threadably engages the shoulder bolt I30. The angle plate I33 extends downwardly and is turned inwardly and this inturned portion is secured to the lower surface of the horizontally disposed plate portion l3 of the card frame I0, by the bolt 93 which also secures the bearing block 52 to the upper surface of the plate I3.

This bolt also penetrates an'angle clip I35, the

purpose of which will be later described.

The substantially vertically disposed lever bar I21 extends downwardly from the shoulder screw I30 and is pivotally connected, as at I31, to a horizontally disposed bar I38. The horizontally disposed bar I38 is pivotally mounted on the stud 38 on which the lower end of the shipper lever 40 is also pivotally mounted. The strap iron member, comprising the arcuate members I2! and I22, and having the outwardly projectin lip I25 integral therewith, is loosely mounted on the cam wheel I20, as heretofore stated, and the outwardly extending lip portion I25 overbalances that portion of the strap iron member, comprising the arcuate members I 2| and I 22, to thus cause the lip portion I25 to move downwardly by gravity. However, the lip portion I25 rests on the upperend of a vertically disposed rod I40, the lower end of which is fixedly mounted in a block I.

The block MI is fixedly mounted on one end of a transverse shaft I42 which extends crosswise of the machine and is oscillatably mounted in the angle clip I35, at one end, and is oscillatably mounted adjacent its opposite end in an angle clip I55. The angle clip I45 is secured to the lower surface of the horizontally disposed plate portion I3 of the card frame II) by one of the bolts 90, which has heretofore been described as securing the calender roll housing iii to the top surface of the horizontally disposed plate portion I3. There is disposed adjacent the angle clips I35 and I45, and being fixedly mounted on the shaft I42, collars I55 and It? to thus prevent endwise movement of the shaft I42.

The shaft I42 extends to the left of the angle clip I45, as observed in Figure 2, and has fixedly mounted thereon a block I50, by any suitable means such as a set screw I5I. The block I50 extends downwardly a short distance below the shaft I42 and is penetrated by a rod I52 extending longitudinally of the machine. This rod I52 extends towards the discharge end of the machine, from the block I50, and has secured thereon a weight member I53 which is secured thereto by a set screw I55 and by loosening the set screw I55 the weight member I53 may be moved longitudinally of the shaft I52, by an operator as desired to accommodate the required density of the Web I5. The rod I52 is fixedly mounted in the downwardly projecting portion of the block I55, by any suitable means such as a set screw I55, and this rod I52 extends towards the dofler cylinder 25 and is then bent upwardly and has, welded to the upper end thereof, as at I55, the trumpet I5 which has heretofore been described as being the point of convergence of the web "Id.

It may be observed, in Figures 1 and 4,- that the shipper lever 40 extends upwardly between the conventional gear housing I05 and the conventional bearing block 55, which is mounted on the vertical side frame member I2 of the card frame IE3. Now, when the card machine is operating, he handle 43 of the shipper lever 50 is lowered in the position shown in Figures 1 and 4. However, when the machine is automatically stopped, in the manner to be presently described, the shipper lever moves from the lowered position shown in Figure 4 to the raised position shown in Figure 3. As the shipper lever t0 moves to this position, the rear surface of the same engages a horizontally disposed pin I55. This pin I50 is supported, during the time that the handle 53 is in the lowered position, as shown in Figure 4, against the rear vertical surface of the conventional gear housing I55. As the shipper lever 40 moves rearwardly the horizontal pin I55 is: engaged by the shipper lever and moves rearwar'dly to the position shown in Figure 3. This horizontal pin I55 is bent forwardly and then to the left in Figure l and. is welded, as at I63, to a substantially vertically disposed arm I52.

This arm I52 extends downwardly and is pivotally mounted on a shoulder screw I53, the shoulder screw I54: being threadably embedded in the bearing block 55. Incidentallythe hole in which the screw [55 is threadably embedded, is the only additional hole needed on the card machine for installing this stop motion; The arm I52 extends upwardly above the pin I50 and has, integral with the upper end thereof, a disk I 55 which serves as a warning signal to the operator of the machine that the doffer cylinder is stopped, that is, when the parts are in the position shown Method of operation Assuming that the pulley 30 is driven by the belt 3| in a conventional manner, to rotate the pinion 23 in a counter-clockwise direction in Figure 3, and that the pulley 63 is driven by the belt 64 in a conventional manner, the handle 43 of the shipper lever 40 is grasped by an operator and moved downwardly from the position shown in Figure 3 to the position shown in Figure 4. Now, inasmuch as the shipper lever 40 is pivoted at M, the lower portion of the shipper lever 40 moves in a counter-clockwise direction from the position shown in Figure 3 to the position shown in Figure 4 and thus moves the vertically disposed plate 3! from left to right in Figures 3 and 4. This causes relative movement between the pin 35 and the groove 30, in the plate 31, and the pin 35 moves upwardly from the position shown in Figure 3 to the position shown in Figure 4 to thus move the pinion 23 upwardly, in an arcuate path from the pivot point 21, to engage the gear 22.

As the plate 37 moves rearwardly, the pin 58, which is fixed in the bars 45 and 4? and penetrates the slot 5 I, in the plate 3?, also moves along the slot 5I to lend support to the rear of the plate 31 inasmuch as the plate 3! is pivotally mounted on the stud 38.

Now, as the upper portion of the shipper lever 40 moves, in a counter-clockwise direction, from the position shown in Figure 3 to the position shown in Figure 4, the pin I69 is engaged by the rear surface of the shipper lever 40, moves from right to left in Figures 3 and 4 until the pin I60 engages the rear vertical surface of the conventional gear housing I03. Inasmuch as the pin I60 is connected to the substantially vertically disposed arm I62, the arm 552, being pivoted at its lower end, moves in an arcuate, counter-clockwise path from the position shown in Figure 3 to the position shown in Figure 4 to where the disk I65, at the upper end thereof, is partially hidden from view of the operator, that is, in back of the upper portion of the shipper lever 40 and the disk I65 remains in the position shown in Figure 4 until the shipper lever 4 is returned from the position shown in Figure 4 to the position shown in Figure 3 and the doffer cylinder ceases to rotate.

As the pinion 23 moves into engagement with the gear 22 the gear 22 is caused to rotate in a clockwise direction in Figures 3 and 4 and the gear 22' rotates the shaft 28 on which the doffer cylinder 20 is fixedly mounted to thus rotate the doifer cylinder 20. As the doffer cylinder 20 rotates the stripper knife is caused to reciprocate adjacent the outer surface of the doffer cylinder 20 by the pulley 63 which is fixedly mounted on the shaft 62 and the shaft 32 transmits reciprocatory motion to the shaft 65 to which the stripper knife I is connected. The reciprocatory motion of the stripper knife I causes the cotton stock material to be removed from the doffer cylinder 20 in the form of the web I4. This web I4 converges and condenses into the sliver I? as it moves into the movable trumpet I and thence through the trumpet I8 and between the calender rolls 82 and 83 in the conventional manner.

The weight member I53 on the rod I52 is so adjusted that, in the event any portion of the web I4 tears away from the rest of the web I4,

it or, if for any reason the web I4 is not of the desired density, then the web, as it is condensed into the sliver I1, is not of sufficient body to hold the movable trumpet I5, in the position shown in Figure 7, against the rear vertical surface of the trumpet I8. This, of course, permits the movable trumpet I5 to move from left to right, in Figure 7, by gravity, and transmits partial rotation to the shaft I42, inasmuch as the trumpet I5 is welded to the rod I52 and the rod I52 is securely mounted in the block I50 which is securely mounted on the shaft I42.

This partial rotation of the shaft I42 causes the block I4I to partially rotate, in a clockwise direction, in Figures 3, 4 and 5, and thus the vertically disposed shaft I40 moves downwardly. This downward movement of the shaft I40 permits the outwardly projecting lip portion I25 to move downwardly slightly by gravity. The outwardly projecting lip I25, being integral with the .arcuate member I22, is caused to reciprocate in a horizontal plane by rotation of the grooved cam wheel I2'0 around the shaft 8'! inasmuch as the cam wheel I20 is eccentrically mounted on the shaft 81. The shaft 81 is driven by the pinion 94 which is fixedly mounted on the righthand end thereof, in Figure 1, and this pinion 94 is engaged by the pinion 95 which is in turn engaged by the pinion 96 and this pinion 96 is engaged by the gear 22 which is driven in the manner heretofore described.

Now, as the grooved cam wheel I29 rotates with the shaft 81, the lip portion I25 is caused to reciprocate, as heretofore described, and the rearmost end of this lip portion I 25 engages the notch I26 in the upper end of the lever bar I2I when the vertically disposed shaft I40 is in its lowered position as heretofore stated.

As the grooved cam wheel I20 rotates from the position shown in Figure 4 in a counterclockwise direction to the position shown in Figure 3 the outwardly projecting lip portion I25 moves from left to right in Figures 4 and 3 and thus moves the upper end of the vertically disposed lever bar from left to right or in a clockwise. direction. This causes the lower end of the lever bar I21 to move in a clockwise direction, from the position shown in Figure 4 to the position shown in Figure 3, and this moves the horizontally disposed arm I38, which is pivotally connected, as at I31, to the lower end of the vertically disposed lever bar I21, from right to the left in Figure 3 and thus moves the vertically disposed plate 31 from the right-hand po- 'sition shown in Figure 4 to the left as shown in Figure 3, inasmuch as the vertically disposed plate .3! is pivotally connected as at 38 to the horizontally disposed arm I38. Now, as the vertically disposed plate moves from the position shown in Figure 4 to the position shown in Figure 3 the guide pin 50, engaging the slot 5|, in the plate 31, guides the vertically disposed plate 3! in a substantially horizontal plane and the guide pin 35 moves along the uppermost slot 36 to thus move the left-hand end of the lever bar 26 downwardly in a, counter-clockwise direction, in Figures 4 and 3, to thus move the pinion 23 downwardly out of engagement with the gear 22 and thus stop the doffer cylinder and associated parts. The forward movement of the vertically disposed plate 31 also causes the lower end of the vertically disposed shipper lever 40 to move to the left, in a clock-wise direction, and the upper end of the shipper lever 40 also moves in a clockwise direction and thus moves the signal disk I65 into view of the operator so that the operator may know that the dolfer cylinder and associated parts are no longer in operation.

When so desired, the operator may move the outwardly extending lip portion I25 of the arouate member I20 out of engagement with the upper end of the vertically disposed shaft M by moving the same in a counter-clockwise direction, in Figure 4, around the grooved cam wheel I so that the outwardly extending wire I28, engages the front vertical surface of the bearing block 92 and the outwardly projecting lip I of the strap iron arcuate member I2! remains in this position inasmuch as it is urged downwardly, by gravity, until an operator desires to return the arcuate member I2I to operating position such as is shown in Figures 3, 4 and 5.

In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a carding machine having a doffer icylinder and a stripper knife for removing the fibres from the doffer cylinder and having driving means for the doffer cylinder, said driving means comprising a gear wheel on the doffer cylinder and a driven pinion for engaging the periphery of the gear wheel, a pivoted lever bar pivotally mounted at one end and having the driven pinion rotatably mounted in an intermediate portion thereof, said carding machine having sliding means provided with a diagonal slot therein and a pin on the free end of the lever bar for engagement with said slot, movement of the sliding means in one direction serving to elevate the free end of said lever bar to cause engagement of the pinion with the gear wheel on the doifer cylinder and movement in an opposite direction serving to disengage the pinion from the gear wheel, said carding machine also having a shipper lever for moving said slidable member, an upwardly extending lever bar pivoted intermediate its ends and having a downwardly depending portion adjacent one end of the sliding member and a pivotal connection between the sliding member and the last-named pivoted member, said carding machine also having pair of calender rolls through which the fibres are passed, and having a driving shaft for driving the calender rolls, an oscillatable shaft disposed below the calender rolls, a rod extending laterally and upwardly from said oscillatable shaft 'and having a movable trumpet mounted on its upper end and through which the fibres are passed from the doifer cylinder to the calender rolls, the driving shaft for the calender rolls having an eccentric member mounted thereon and a member encircling the eccentric member and having a laterally projecting lip associated therewith, an upwardly extending rod secured on said oscillatable shaft and on the upper end of which the said lip is adapted to rest and have sliding movement, said movable trumpet being adapted to move toward the dofier cylinder upon a predetermined decrease in the density of the fibres passing through the machine, thus oscillating the upwardly extending rod secured on said oscillatable shaft to lower the path of travel of the lip extending from said eccentric member to cause it to engage the upper end of the upwardly extending lever bar to thus move the slidable member to lower the free end of the first pivoted lever bar to thereby disengage the pinion in the pivoted lever bar from engagement with the gear wheel on the doffer cylinder shaft.

2. In a :carding machine having a doffer cylinder and means for driving the same and having a stripper knife for stripping the fibres from the doffer cylinder and having a pair of calender rolls through which the fibres are passed, a shaft for driving one of the calender rolls, an oscillatable member eccentrically mounted on said shaft, an oscillatable shaft disposed below and in off set relation to the drive shaft for the rolls, and said oscillatable shaft having an outwardly and upwardly extending rod projecting in front of the calender rolls, a movable trumpet mounted on the upper end of said rod and through which the fibres are passed on their way from the dofier cylinder to the calender rolls, a normal density in the web of fibres being stripped from the doffer cylinder serving to move the movable trumpet on the upper end of said rod toward the calender rolls, and a, decrease in density of the fibres passing through the movable trumpet allowing the movable trumpet to move toward the doffer :cylinder, means on the oscillatable shaft which supports the trumpet for normally holding the oscillatable member on the shaft which drives the calender rolls in elevated position, and means engagable by the oscillatable member mounted on the driving shaft which drives the calender rolls for disconnecting the driving means from the doffer cylinder upon swinging of the trumpet away from the calender rolls.

THOMAS L. HAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 227,003 Hayden Apr. 27, 1880 533,093 Spencer Jan. 29, 1895 1,450,044 Morris Mar. 27, 1923 1,578,921 Roe et a1 Mar. 30, 1926 2,270,720 Thompson Jan. 20, 1942 

